01-17-2021, 08:05 AM
(This post was last modified: 01-17-2021, 08:06 AM by m42uko.
Edit Reason: Remove accidental @ mention
)
Hi everyone,
I've been using my Pinecil for the past few days, and it's been great (like, really!
).
However, when I plugged it in this morning, it didn't turn on anymore. A quick measurement with the multi meter revealed that there is dead short (~0.5 Ohms) on the VBUS_TYPEC rail. So I did some more troubleshooting and tried to locate the point of lowest resistance, and it appears to be right in front of the RT7272B DC-DC converter. I haven't removed that IC yet (need to get my hot air station out for that), so I can't be 100% sure, but it seems likely that it's the culprit.
As for the cause of the short, I have no idea at the moment. I always supplied it from a lab power supply set to 20V, and it's been working perfectly fine right until this morning.
Three questions:
1. Has anyone else seen this kind of issue?
2. Is it generally possible to get replacement ICs from Pine64? Or should I just look in the usual places (Mouser, Farnell, Digikey, ...)?
3. @ Pine64 Team: Should I raise an RMA? (I don't think I did anything that could cause to break, so maybe I just got unlucky and got a bad unit.)
Thank you!
Markus
I've been using my Pinecil for the past few days, and it's been great (like, really!
).However, when I plugged it in this morning, it didn't turn on anymore. A quick measurement with the multi meter revealed that there is dead short (~0.5 Ohms) on the VBUS_TYPEC rail. So I did some more troubleshooting and tried to locate the point of lowest resistance, and it appears to be right in front of the RT7272B DC-DC converter. I haven't removed that IC yet (need to get my hot air station out for that), so I can't be 100% sure, but it seems likely that it's the culprit.
As for the cause of the short, I have no idea at the moment. I always supplied it from a lab power supply set to 20V, and it's been working perfectly fine right until this morning.
Three questions:
1. Has anyone else seen this kind of issue?
2. Is it generally possible to get replacement ICs from Pine64? Or should I just look in the usual places (Mouser, Farnell, Digikey, ...)?
3. @ Pine64 Team: Should I raise an RMA? (I don't think I did anything that could cause to break, so maybe I just got unlucky and got a bad unit.)
Thank you!
Markus
